/*
 *  Copyright (c) 2010 Brian Stanek <bstanek@gmail.com>
 *
 *  Permission is hereby granted, free of charge, to any person
 *  obtaining a copy of this software and associated documentation
 *  files (the "Software"), to deal in the Software without
 *  restriction, including without limitation the rights to use,
 *  copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following
 *  conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *  OTHER DEALINGS IN THE SOFTWARE.
 */

package guice.scopes
{

import guice.Key;
import guice.Provider;
import guice.Scope;

internal class SingletonScope implements Scope
{

    //--------------------------------------------------------------------------
    //
    //  Methods: Scope
    //
    //--------------------------------------------------------------------------

    public function scope(key:Key, creator:Provider):Provider
    {
        return new SingletonProvider(creator);
    }

    public function toString():String
    {
        return "[Scope SINGLETON]";
    }

}

}

import guice.Provider;

class SingletonProvider implements Provider
{

    //--------------------------------------------------------------------------
    //
    //  Constructor
    //
    //--------------------------------------------------------------------------

    public function SingletonProvider(creator:Provider)
    {
        super();
        this.creator = creator;
    }

    //--------------------------------------------------------------------------
    //
    //  Variables
    //
    //--------------------------------------------------------------------------

    private var creator:Provider;

    private var instance:*;

    //--------------------------------------------------------------------------
    //
    //  Methods: Provider
    //
    //--------------------------------------------------------------------------

    public function get():*
    {
        if (instance == null)
        {
            instance = creator.get();
        }
        return instance;
    }

    public function toString():String
    {
        return creator + "[Scope SINGLETON]";
    }

}

